﻿// File: InvariantProperty.cs
//
// Copyright 2008 Chris Varley (http://www.contractdriven.net/)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using System;
using System.Runtime.Remoting.Contexts;
using System.Runtime.Remoting.Messaging;
using System.Security.Permissions;

namespace ContractDriven.Aspects
{
	/// <summary>
	/// This class implements IContextProperty and IContributeObjectSink
	/// and is used by the .NET Framework infrastructure to add 
	/// our InvariantAspect Message Sink to the object processing chain
	/// </summary>
    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
	public class InvariantProperty : IContextProperty, IContributeObjectSink
    {
        #region IContributeObjectSink Members
        
        public IMessageSink GetObjectSink(MarshalByRefObject o, IMessageSink next)
        {
            return new InvariantAspect(o, next);
        }
        #endregion

		#region IContextProperty Members
        
		public void Freeze(Context newContext)
		{
			//nothing to do
		}

        
		public bool IsNewContextOK(Context newCtx)
		{
			return true;
		}

        
		public string Name
		{
			get { return "InvariantProperty"; }
		}

		#endregion
	}
}
